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HIV functional impairment

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https://www.readbyqxmd.com/read/29140230/effect-of-tenofovor-diproxil-fumarate-on-renal-function-and-urinalysis-abnormalities-in-hiv-infected-cameroonian-adults
#1
Carlos Fritzsche, Jens Rudolph, Barbara Huenten-Kirsch, Christoph J Hemmer, Robert Tekoh, Pius B Kuwoh, Aenne Glass, Emil C Reisinger
In Sub-Saharan Africa, the prevalence of HIV-associated kidney diseases is as high as 53.3%. Combined antiretroviral treatment (cART), especially tenofovir disoproxil fumarate (TDF), is known to be nephrotoxic. We undertook this cross-sectional study conducted in 2015 at the Regional Hospital Limbe in the Southwest Region of Cameroon to determine the prevalence of renal dysfunction and its correlates among treatment-experienced HIV-infected patients on TDF and treatment-naïve patients. In April 2016, a follow-up was performed on those who had been treatment-naïve and were started on cART after enrolment in the study...
November 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29136775/high-parathyroid-hormone-concentration-in-tenofovir-treated-patients-are-due-to-inhibition-of-calcium-sensing-receptor-activity
#2
Alessandra Mingione, Katia Maruca, Federica Chiappori, Francesca Pivari, Caterina Brasacchio, Tiziana Quirino, Ivan Merelli, Laura Soldati, Paolo Bonfanti, Stefano Mora
Bone health impairment is a common finding in HIV-infected patients on antiretroviral treatment. High serum parathyroid hormone (PTH) concentration in patients on antiretroviral treatment containing tenofovir disoproxil fumarate (TDF) has been reported. Hyperparathyroidism was not always sustained by a reduction in vitamin D concentration. We thus hypothesized a direct inhibitory effect of TDF on the Calcium-sensing receptor (CaSR), leading to hyperparathyroidism. Human embryonic kidney cells were transfected with CASR wild-type gene or mutated in different sites (N124K, T1051G, C788T, T888M)...
November 7, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29131878/association-of-brain-structure-changes-and-cognitive-function-with-combination-antiretroviral-therapy-in-hiv-positive-individuals
#3
Ryan Sanford, Lesley K Fellows, Beau M Ances, D Louis Collins
Importance: Despite the introduction of combination antiretroviral therapy (cART), HIV-associated neurocognitive disorders continue to be a problem for treated HIV-positive individuals. The cause of this impairment remains unclear. Objective: To determine if detectable brain changes occur during a 2-year period in HIV-positive individuals who were aviremic and treated with cART. Design, Setting, and Participants: In this longitudinal case-control study, participants underwent neuroimaging and neuropsychological assessment approximately 2 years apart...
November 13, 2017: JAMA Neurology
https://www.readbyqxmd.com/read/29117799/subclinical-executive-function-impairment-in-children-with-asymptomatic-treated-phenylketonuria-a-comparison-with-children-with-immunodeficiency-virus
#4
Patrizia Bisiacchi, Vincenza Tarantino, Giovanni Mento
In this study we compared the neuropsychological profile of phenylketonuria (PKU) and human immunodeficiency virus (HIV) to examine the specificity of the executive function (EF) impairment reported in these two patologies. A total of 55 age-matched children and adolescents were assessed, including 11 patients with PKU, 16 patients with HIV and 28 healthy controls, underwent a neuropsychological assessment. Although neither the PKU nor the HIV group scored below the normative ranges, both groups showed lower scores in neuropsychological tests engaging EFs than controls...
November 9, 2017: Cognitive Neuropsychology
https://www.readbyqxmd.com/read/29112532/speech-in-noise-perception-as-a-marker-of-cognitive-impairment-in-hiv-infection
#5
Yi Zhan, Abigail M Fellows, Tangkai Qi, Odile H Clavier, Sigfrid D Soli, Xiudong Shi, Jiang Gui, Yuxin Shi, Jay C Buckey
OBJECTIVES: Human immunodeficiency virus positive (HIV+) individuals report hearing difficulties, but standard audiological tests show no, or small, changes in peripheral hearing ability. The hearing complaints may reflect central nervous system (CNS) auditory processing deficits, rather than middle or inner ear problems, and may result from CNS damage due to HIV infection or treatment. If central auditory task performance and cognitive deficits in HIV+ individuals are shown to be related, then central auditory tests might serve as a "window" into CNS function in these patients...
November 4, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/29109730/t-follicular-helper-cells-and-b-cell-dysfunction-in-aging-and-hiv-1-infection
#6
REVIEW
Suresh Pallikkuth, Lesley de Armas, Stefano Rinaldi, Savita Pahwa
T follicular helper (Tfh) cells are a subset of CD4 T cells that provide critical signals to antigen-primed B cells in germinal centers to undergo proliferation, isotype switching, and somatic hypermutation to generate long-lived plasma cells and memory B cells during an immune response. The quantity and quality of Tfh cells therefore must be tightly controlled to prevent immune dysfunction in the form of autoimmunity and, on the other hand, immune deficiency. Both Tfh and B cell perturbations appear during HIV infection resulting in impaired antibody responses to vaccines such as seasonal trivalent influenza vaccine, also seen in biologic aging...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29099110/deterioro-cognitivo-en-adultos-mayores-con-vih-sida-y-s%C3%A3-ndrome-de-fragilidad
#7
Alfonso Zamudio-Rodríguez, Sara Aguilar-Navarro, José Alberto Avila-Funes
In 2014, 17% of newly diagnosed HIV infection cases in the United States were made in people over 50 years of age; actually, it is expected that in the near future this population group will be the most affected. This epidemiological change can be explained by the increased incidence of HIV infection in people over 50 years, but also by its higher prevalence due to treatment advances. As HIV infection has become a chronic one, new challenges have emerged. For instance, early-onset "geriatric syndromes," such as frailty, have been recognized in these patients...
2017: Gaceta Médica de México
https://www.readbyqxmd.com/read/29093081/analysis-of-select-hsv-1-proteins-for-restriction-of-human-immunodeficiency-virus-type-1-the-hsv-1-gm-protein-potently-restricts-hiv-1-by-preventing-the-intracellular-transport-and-processing-of-env-gp160
#8
Sachith Polpitiya Arachchige, Wyatt Henke, Ankita Pramanik, Maria Kalamvoki, Edward B Stephens
Proteins encoded by viruses that impair or shutdown specific host cell functions during replication can be used as probes to identify potential proteins/pathways used in the replication of viruses from other families. We screened nine proteins from herpes simplex virus type 1 (HSV-1) for the ability to enhance or restrict human immunodeficiency virus type 1 (HIV-1) replication. We show that several HSV-1 proteins (glycoprotein M (gM), US3 and UL24) potently restricted the replication of HIV-1. Unlike UL24 and US3, which reduced viral protein synthesis, we observed that gM restriction of HIV-1 occurred through interference of the processing and transport of gp160, resulting in a significantly reduced level of mature gp120/gp41 released from cells...
November 1, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29091911/il-23-signaling-in-th17-cells-is-inhibited-by-hiv-infection-and-is-not-restored-by-haart-implications-for-persistent-immune-activation
#9
Jason R Fernandes, Tamara K Berthoud, Ashok Kumar, Jonathan B Angel
OBJECTIVES: HIV infection causes a profound depletion of gut derived Th17 cells, contributing to loss of mucosal barrier function and an increase in microbial translocation, thus driving systemic immune activation. Despite normalization of circulating CD4+ T cell counts with highly active antiretroviral therapy (HAART), Th17 frequency and function often remain impaired. Given the importance of interleukin (IL)-23 in the generation and stabilization of Th17 cells we hypothesized that impaired IL-23 signaling causes persistent Th17 dysfunction in HIV infection...
2017: PloS One
https://www.readbyqxmd.com/read/29081720/effects-of-recent-alcohol-consumption-level-on-neurocognitive-performance-in-hiv-individuals
#10
Kara R Douglas-Newman, Rachel V Smith, Mary V Spiers, Timothy Pond, Henry R Kranzler
OBJECTIVES: Although HIV+ individuals may be at increased risk of alcohol-related cognitive impairment, the relations between drinking level and cognitive performance in these individuals are not well understood. We examined whether higher levels of recent drinking in HIV+ individuals were associated with poorer cognitive performance, particularly in executive functioning (EF) and memory. METHODS: We administered a comprehensive cognitive battery to 120 seropositive subjects (101 men) who reported alcohol consumption in the preceding 90 days...
September 2017: Addictive Disorders & Their Treatment
https://www.readbyqxmd.com/read/29080244/impaired-patient-reported-outcomes-persist-in-hiv-hcv-co-infected-patients-and-in-cirrhotic-patients-despite-hcv-clearance
#11
Fabienne Marcellin, Philippe Morlat, Linda Wittkop, Dominique Salmon-Ceron, Maria Patrizia Carrieri
Dirks et al.(1) 's recent study provides greater insight into the neuropsychiatric symptoms experienced by HCV infected patients and questions how these symptoms are associated with HCV clearance. The authors show that in HCV infected patients with mild liver disease, none of the following outcomes depend on HCV clearance: cognitive function, mood alteration, health-related quality of life (HRQL) and fatigue (FIS scores). However, these results may not be generalizable to HIV-HCV co-infected patients and cirrhotic patients, who were excluded from the study and who are generally more concerned by fatigue and neuropsychiatric symptoms...
October 27, 2017: Journal of Viral Hepatitis
https://www.readbyqxmd.com/read/29063513/variability-in-c-reactive-protein-is-associated-with-cognitive-impairment-in-women-living-with-and-without-hiv-a-longitudinal-study
#12
Leah H Rubin, Lorie Benning, Sheila M Keating, Philip J Norris, Jane Burke-Miller, Antonia Savarese, Krithika N Kumanan, Saria Awadalla, Gayle Springer, Kathyrn Anastos, Mary Young, Joel Milam, Victor G Valcour, Kathleen M Weber, Pauline M Maki
Despite the availability of effective antiretroviral therapies, cognitive impairment (CI) remains prevalent in HIV-infected (HIV+) individuals. Evidence from primarily cross-sectional studies, in predominantly male samples, implicates monocyte- and macrophage-driven inflammatory processes linked to HIV-associated CI. Thus, peripheral systemic inflammatory markers may be clinically useful biomarkers in tracking HIV-associated CI. Given sex differences in immune function, we focused here on whether mean and intra-individual variability in inflammatory marker-predicted CI in HIV+ and HIV- women...
October 23, 2017: Journal of Neurovirology
https://www.readbyqxmd.com/read/29051714/a-self-report-measure-to-detect-neurocognitive-impairment-among-incarcerated-people-living-with-hiv-in-malaysian-context-an-exploratory-factor-analysis
#13
Roman Shrestha, Damian Weikum, Michael Copenhaver, Frederick L Altice
While neurocognitive impairment (NCI) among people living with HIV (PLWH) who use drugs and its impact on HIV treatment outcomes continue to be widely investigated, there remains a critical gap in NCI assessment among HIV-infected people who use drugs (PWUD) in Malaysian context. The present study, therefore, sought to improve the utility of the existing Neuropsychological Impairment Scale (NIS) as a screening tool for assessing NCI by establishing its psychometric properties in the Malaysian context. The NIS is a brief, self-report measure originally designed to assess NCI by having individuals rate a range of items that may influence cognitive functioning...
August 2017: International Journal of Mental Health and Addiction
https://www.readbyqxmd.com/read/29040163/adipose-tissue-is-enriched-for-activated-and-late-differentiated-cd8-t-cells-and-shows-distinct-cd8-receptor-usage-compared-to-blood-in-hiv-infected-persons
#14
John R Koethe, Wyatt McDonnell, Arion Kennedy, Chike O Abana, Mark Pilkinton, Ian Setliff, Ivelin Georgiev, Louise Barnett, Cindy C Hager, Rita Smith, Spyros A Kalams, Alyssa Hasty, Simon Mallal
BACKGROUND: Adverse viral and medication effects on adipose tissue contribute to the development of metabolic disease in HIV-infected persons, but T cells also have a central role modulating local inflammation and adipocyte function. We sought to characterize potentially pro-inflammatory T cell populations in adipose tissue among persons on long-term antiretroviral therapy, and assess whether adipose tissue CD8 T cells represent an expanded, oligoclonal population. METHODS: We recruited 10 HIV-infected, overweight and obese adults on efavirenz, tenofovir, and emtricitabine for >4 years with consistent viral suppression...
October 14, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/29034105/changes-of-the-intestinal-microbiome-host-homeostasis-in-hiv-infected-individuals-a-focus-on-the-bacterial-gut-microbiome
#15
REVIEW
Ana Beatriz Dein Terra Mota Ribeiro, Markus M Heimesaat, Stefan Bereswill
Human immunodeficiency virus (HIV) infections cause severe CD4+ T cell depletion leading to chronic inflammation and immune activation, impaired barrier function, and microbial translocation. Even under effective antiretroviral therapy, these processes persist, leading to gut microbiome dysbiosis and disturbance of microbiome-host homeostasis. This systematic review aims at analyzing how gut microbiome and host immune system influence each other during HIV pathogenesis. An online search applying the PubMed database was conducted...
September 2017: European Journal of Microbiology & Immunology
https://www.readbyqxmd.com/read/29033941/functional-analysis-of-phagocyte-activity-in-whole-blood-from-hiv-tuberculosis-infected-individuals-using-a-novel-flow-cytometry-based-assay
#16
Ankur Gupta-Wright, Dumizulu Tembo, Kondwani C Jambo, Elizabeth Chimbayo, Leonard Mvaya, Shannon Caldwell, David G Russell, Henry C Mwandumba
The accurate assessment of immune competence through ex vivo analysis is paramount to our understanding of those immune mechanisms that lead to protection or susceptibility against a broad range of human pathogens. We have developed a flow cytometry-based, whole blood phagocyte functional assay that utilizes the inflammatory inducer zymosan, coupled to OxyBURST-SE, a fluorescent reporter of phagosomal oxidase activity. The assay measures both phagocytic uptake and the superoxide burst in the phagocyte populations in whole blood...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29029940/antibody-dependent-phagocytosis-adp-responses-following-trivalent-inactivated-influenza-vaccination-of-younger-and-older-adults
#17
Fernanda Ana-Sosa-Batiz, Angus P R Johnston, P Mark Hogarth, Bruce D Wines, Ian Barr, Adam K Wheatley, Stephen J Kent
Globally the most commonly utilised immunisation against influenza is the trivalent inactivated influenza vaccine (TIV) derived from an A/H1N1, an A/H3N2 and aB type influenza virus. Vaccine effectiveness of TIV varies year to year, depending on how well antigenically matched the strains in the vaccine are compared to circulating strains [1,2]. Moreover, vaccine effectiveness can vary within certain subpopulations such as HIV-positive, young children and the elderly. Decreased vaccine effectiveness in the elderly is associated with impaired Ab production, as measured by standard hemagglutination inhibition (HAI) assays...
November 7, 2017: Vaccine
https://www.readbyqxmd.com/read/29029647/renal-manifestations-of-hiv-during-the-antiretroviral-era-in-south-africa-a-systematic-scoping-review
#18
Shirelle Assaram, Nombulelo P Magula, Suman Mewa Kinoo, Tivani P Mashamba-Thompson
BACKGROUND: It is estimated that 650,000 patients may develop human immunodeficiency virus (HIV)-related renal disease in South Africa. South Africa has recently adopted WHO policy, stipulating that all HIV-infected patients have access to antiretroviral treatment (ART) irrespective of CD4 cell count. METHODS: We searched Google Scholar, PubMed, Medline, Cochrane Library, Worldcat.org and EBSCO host databases from July 2015 to December 2015. Eligibility criteria included articles pertaining to renal manifestations of HIV in South Africa from 2004 to 2015 in adult patients (≥ 18 years)...
October 13, 2017: Systematic Reviews
https://www.readbyqxmd.com/read/29028125/ledipasvir-and-tenofovir-drug-interaction-in-hiv-hcv-co-infected-patients-impact-on-tenofovir-ctrough-and-renal-safety
#19
Caroline Solas, Sylvie Bregigeon, Olivia Faucher-Zaegel, Sylvie Quaranta, Véronique Obry-Roguet, Catherine Tamalet, Bruno Lacarelle, Isabelle Poizot-Martin
We evaluate the impact of ledipasvir on both tenofovir plasma trough concentration (Ctrough ) and estimated glomerular renal function (eGFR) in HIV-HCV co-infected patients receiving a tenofovir(TDF)-based antiretroviral regimen and treated with ledipasvir/sofosbuvir. Twenty-six patients [81% male, median age: 51years; HCV genotype 1(75%)/4(15%)] were included. Tenofovir Ctrough (interquartile:IQR) increased from 78ng/mL (53-110) at baseline to 141ng/mL (72-176) at M1 (p=0.003). No significant difference on eGFR using both Cockroft-Gault and MDRD formula, respectively [median(IQR)] was observed between baseline [101...
October 13, 2017: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/29016449/self-reported-decline-in-everyday-function-cognitive-symptoms-and-cognitive-function-in-people-with-hiv
#20
Rosanna Laverick, Lewis Haddow, Marina Daskalopoulou, Fiona Lampe, Richard Gilson, Andrew Speakman, Andrea Antinori, Tina Bruun, Anna Vassilenko, Simon Collins, Alison Rodger
BACKGROUND: We determined factors associated with self-reported decline in activities of daily living (ADLs) and symptoms of cognitive impairment in HIV positive adults in 5 European clinics. METHODS: HIV+ adults underwent computerized and pen-and-paper neuropsychological tests and questionnaires of cognitive symptoms and ADLs. We considered cognitive function in 5 domains, psychosocial factors, and clinical parameters as potentially associated with symptoms. Separate regression analyses were used to determine factors associated with a decline in ADL (defined as self-reported decline affecting ≥2 ADLs and attributed to cognitive difficulties) and self-reported frequency of symptoms of cognitive impairment...
November 1, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
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